engineering recuitment KPSC Assistant Engineer Civil Mock Test 2020 Strength of Materials Simple Stress and Strain Thermal Stress and Strain
A steel rod 10 m long is at a temperature of 20°C. The rod is heated to a temperature of 60°C. What is the stress-induced in the rod if it is allowed to expand by 4 mm, when E = 200 GPa and α = 12 × 10-6/°C?
1
64 MPa
2
48 MPa
3
32 MPa
4
16 MPa